See your code come to life

Blockly is an open source visual programming editor by Google that uses drag-and-drop blocks, producing clean code in your desired language

interactive demo

Try Blockly

Demo Instructions:

  • Change the "print" text of "Hello World!" to say "Google IO rocks!". Then press "Run" to see your message
  • Connect and explore with the visual blocks (left) and watch the code change (right)
  • Toggle between programming languages to see your code change